Class 12 Chemistry Chapter 4 The d and f Block elements MCQ: On this page we have given Class 12 Chemistry Chapter 4 The d and f Block elements Multiple Choice (MCQ) Question and Answer for students of CBSE board. Students will very much helpful for this question and answer.
(1) Which groups are included in d-block elements?
(a) 1 and 2
(b) 3 to 12
(c) 2 to 11
(d) 11 to 14
Ans : 3 to 12
(2) Which groups are included in f-block elements?
(a) 3f and 4f orbitals.
(b) 4f to 5f orbitals.
(c) 5f to 7f orbitals.
(d) 4f to 8f orbitals.
Ans :4f to 5f orbitals
(3) Where are placed the f-block elements ?
(a) Top
(b) Bottom
(c) Left
(d) Right
Ans : Bottom
(4) Which type of elements are present in d and f blocks?
(a) Transition metal
(b) Inner transition metal
(c) Mealkalin earth metal
(d) Both a and b
Ans : Both a and b
(5) Which elements are present in 3rd series of the transition metal?
(a) Y to cd
(b) Sc to Zn
(c) Ip to Hg
(d) Th to Lr
Ans :Sc to Zn
(6) Which elements are present in 4d series of the transition metals?
(a) Sc to Zn
(b) Y to Cd
(c) Ce to Cu
(d) Th to Lr
Ans : Y to Cd
(7) Which series are known as lanthanides and actinides series?
(a) 4f and 5f
(b) 3d and 4d
(c) 4d and 5d
(d) 5d and 6d
Ans : 4f and 5f
(8) Which elements are presents in 4f series of the inner transition elements?
(a) Th to Lr
(b) Ce to Lu
(c) Sc to Zn
(d) Y to cd
Ans :Ce to Lu?
(9) Which metal are belongs in transition metal series?
(a) Solver
(b) Gold
(c) Titanium
(d) All of the above
Ans : All of the above
(10) What is the electronic of Pd?
(a) 4d105S1
(b) 4d105s0
(c) 5d104 S0
(d) 5d11 4S0
Ans : 4d105s0
(11) Which type of lattice structures of transition metal of titanium?
(a) hcp
(b) ccp
(c) X
(d) Both a and b
Ans :hcp
(12) Which type of lattice structure of transition metal of Nickel?
(a) hcp
(b) bcc
(c) ccp
(d) X
Ans :ccp
(13) Which transition metal have very hard and have low volatility?
(a) Zn
(b) Cd
(c) Hg
(d) Mn
Ans :Mn
(14) The filling of 4f before 5d orbital results in a regular decrease in atoms radii called as –
(a) Actinide contraction
(b) Lanthanoid contraction
(c) Transition contraction
(d) Alkaline contraction
Ans :Lanthanoid contraction
(15) What is the radius of Zn?
(a) 159 pm
(b) 160 pm
(c) 161 pm
(d) 170 pm
Ans : 160 pm
(16) What is the radius of Hf?
(a) 160 pm
(b) 154 pm
(c) 158 pm
(d) 159 pm
Ans : 159 pm
(17) What is the atomic number of Nickel?
(a0 27
(b) 28
(c) 29
(d) 30
Ans : 28
(18) What is the enthalpy of atomization of Cr on KJ mol-1?
(a) 473
(b) 515
(c) 397
(d) 281
Ans : 397
(19) What is the radii of Fe?
(a) 77
(b) 82
(c) 79
(d) 64
Ans : 77
(20) What is the radii of Cu in pm ?
(a) 70
(b) 74
(c) 73
(d) 75
Ans : 73
(21) What is the density of Mn in gcm-3?
(a) 7.19
(b) 7.12
(c) 4.1
(d) 3.43
Ans : 7.21
(22) What is the density of Fe in g cm-3?
(a) 7.21
(b) 8.7
(c) 7.19
(d) 7.8
Ans : 7.8
(23) What is the enthalpy of atomization of Zn in KJ mol-1?
(a) 339
(b) 430
(c) 126
(d) 416
Ans : 126
(24) What is the density of Sc in g cm-3?
(a) 4.1
(b) 6.07
(c) 7.19
(d) 3.43
Ans : 3.43
(25) Which transition element does not exibit variable oxidation states?
(a) Scandium
(b) Titanium
(c) Vanadium
(d) Zinc
Ans : Scandium
(26) What is the value of ΔaH0 of element Ti?
(a) 469
(b) 515
(c) 279
(d) 431
Ans : 469
(27) What is the configuration of ion Sc3+ ?
(a) 3d0
(b)3d1
(c) 3d2
(d) 3d4
Ans : 3d0
(28) What is the configuration of ion fe2+?
(a) 3d4
(b) 3d0
(c) 3d6
(d) 3d10
Ans : 3d6
(29) Calculate the magnetic moment of a divalent ion in aqueous solution if its atomic number is 25 .
(a) 4.23BM
(b) 3.24 BM
(c) 5.92 BM
(d) 6.32 BM
Ans : 5.92 BM
(30) Which is the color of fe2+ ion?
(a) Green
(b) Colorless
(c) Yellow
(d) Pink
Ans : Green
(31) Which is color of Ti3+ ion?
(a) Violet
(b) Blue
(c) Green
(d) Pink
Ans : Blue
(32) Which is the color of Cr2+ ion ?
(a) Violet
(b) Blue
(c) Green
(d) Pink
Ans : Blue
(33) What is the configuration of Zn2+ ion?
(a) 3d8
(b) 3d4
(c) 3d6
(d) 3d10
Ans : 3d10
(34) Which are the physical and chemical characteristics?
(a) High melting point
(b) Very hard
(c) Chemically inert
(d) All of the above
Ans : All of the above
(35) Which one are the ferrous alloys?
(a) Chromium
(b) Vanadium
(c) Tungsten
(d) All of the above
Ans : All of the above
(36) Which mixer made brass metal?
(a) Copper-tin
(b) Copper-Zinc
(c) Zinc-tin
(d) Copper – bronze
Ans : Copper-Zinc
(37) Which mixture made bronze metal?
(a) Copper-tin
(b) Copper-zinc
(c) Zinc-tin
(d) Copper brass
Ans: (a) Copper-tin
(38) What is the chemical formula of potassium dichromate?
(a) K2Cr2O8
(b) K2Cr4O8
(c) K2Cr2O7
(d) K2Cr3O9
Ans: (c) K2Cr2O7
(39) What is the chemical formula of chromite ore?
(a) Fe2Cr2O7
(b) FeCr2O4
(c) K2Cr2O7
(d) K3Cr3O9
Ans: (b) FeCr2O4
(40) How much the angle length of Cr – o – Cr?
(a) 179°
(b) 126°
(c) 163°
(d) 150°
Ans: (b) 126°
(41) How many elements are present in lanthanum series?
(a) 12
(b) 13
(c) 14
(d) 19
Ans: (c) 14
(42) How many elements ore present in actinides?
(a) 12
(b) 14
(c) 16
(d) 18
Ans: (b) 14
(43) The cumulative effect of the contraction of the lanthanoid series known as –
(a) Actinide contraction
(b) Lanthanoide contraction
(c) Transition contraction
(d) Alkaline contraction
Ans: (b) Lanthanoide contraction
(44) What is the radius of Zr?
(a) 150pm
(b) 160pm
(c) 170pm
(d) 189pm
Ans: (b) 160pm
(45) What is the radius of HF?
(a) 148pm
(b) 159pm
(c) 199pm
(d) 154pm
Ans: (b) 159pm
(46) What is the F° value for Ce4+/Ce3+?
(a) -1.74V
(b) +1.74V
(c) -1.89V
(d) +1.89V
Ans: (b) +1.74V
(47) What is the atomic number of Holmium?
(a) 66
(b) 67
(c) 69
(d) 71
Ans: (b) 67
(48) What is the atomic number of Thulium?
(a) 68
(b) 60
(c) 69
(d) 59
Ans: (c) 69
(49) What is the atomic number of lutetium?
(a) 70
(b) 69
(c) 62
(d) 71
Ans: (d) 71
(50) Samarium melt at what temperature?
(a) 1440K
(b) 1623K
(c) 1224K
(d) 1000K
Ans: (b) 1623K
(51) How much the first ionization enthalpies of the lanthanoids?
(a) 500 KJ mol-1
(b) 450 KJ mol-1
(c) 600 KJ mol-1
(d) 700 KJ mol-1
Ans: (c) 600 KJ mol-1
(52) What is the atomic number of plutonium?
(a) 92
(b) 94
(c) 100
(d) 103
Ans: (b) 94
(53) What is the atomic number of Nobelium?
(a) 94
(b) 100
(c) 89
(d) 102
Ans: (d) 102
(54) What is the oxidation state of lawrencium?
(a) +2
(b) +3
(c) +4
(d) +6
Ans: (b) +3
(55) Name a member of the lanthanoid series which is well known to exibit +4 oxidation state?
(a) Cerium
(b) Curium
(c) Fermium
(d) Nobelium
Ans: (a) Cerium
